Updating App.js with ProgressViewIOS

When planning this app in the last chapter, we wrote that this list should also prominently display the user's set budget for the month along with a progress indicator showing how close they are to hitting their budget.

Using ProgressViewIOS, we can depict our user's progress toward their monthly limit. The following props will be used in this project:

• progress: This is a number between 0 and 1 that tracks the value of the progress bar
• progressTintColor: This is a string that sets the color of the progress bar

You can render a ProgressViewIOS component like this:

<View> 
  <ProgressViewIOS 
    progress={ 0.75 } 
    progressTintColor={ '#86B2CA' } 
  /> 
</View> 

In this section, we should update Expenses to do the following things:

• First, we should modify the checkCurrentMonthBudget function from storageMethods to also return the amount spent for the month
• Then, App.js should have its _updateBudget function updated to account for the amount...